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The Effect of Pressurized Hydrogen Gas on the Fatigue Properties of the Heat-Affected Zones in X52 and X70 Pipelines

The National Institute of Standards and Technology (NIST) and Pipeline and Hazardous Materials Safety Administration (PHMSA) seek to address concerns over heat-affected zones voiced by American Society of Mechanical Engineers (ASME) B31.12 committee on Hydrogen Piping and Pipelines.